Ments



A. A. HAAHR.

HEEL PRICKING MACHINE.

APPLICATION FILED AUG.22, 1916.

1,338,013. Patented Apr. 27, 1920.

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A. A. HAAHR.

HEEL PRICKING MACHINE.

APPLICATION FILED AUG.22, I915.

Patented Apr. 27, 1920.

3 SHEETS-SHEET 2.

A A. HAAHR.

HEEL PRICKING MACHINE.

APPLICATION FILED AUG.22,1916.

1,,338,()13 Patented Apr. 27, 1926.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

A CORPORATION OF NEW JERSEY.

HEEL-PRICKING MACHINE.

Application filed August 22, 1916. Serial No.

To all whom it may concern:

Be it known that I, ANTON AUGUST Aerie, a subject of the King of Denmark, residing at Copenhagen, Denmark, have 1nvented certain Improvementsin Heel-Pucking Machines, of which the following description, in connection with the accom panying drawings, is a specificatlon lik e reference characters on the drawings 1nd1- cating like parts in the several figures.

This invention relates to heel plucking machines and, more particularly, to mechanism for regulating the depth of the pricking in accordance with the height of a heel,

In pricking heels of various helghts, it is desirable that the depth of the holes be greater in high heels than in low ones and, in machines heretofore used for heel pricking, no provision has been made for changing the depth of the awl holes, except by the expenditure of considerable labor n1 making adjustments; frequently the change is made by taking a set of awls out of the machine and substituting an entirely new set of awls of different length.

The object of the present invention is to reduce the labor and expenditure of time consequent upon the necessity of changing the heel pricking machine to prick holes of diiferent depths and, further, to insure that heels will always be pricked to the proper depth, regardless of their height.

In accordance with the objects above stated, an important feature of the invention consists in the provision, in a heel pricking machine, of novel means for quickly and accurately adjusting or changing the machine to cause it to prick a heel of any height, within the range of the machine, to the de-' sired, or proper, depth.

he accompanying drawings illustrate a heel pricking machine embodying the present invention, provided with a form which corresponds to the size and shape of a heel to be pricked and with means for adjusting the depth to which the awls pierce the heel in accordance with the height-of the heel.

Referring to the drawings,

Figure 1 is a vertical section, taken from front to rear of the machine;

Fig. 2 is a side view of the machine;

*ig. 3 is a front view of the machine; and

Figs. 4, 5 and 6 are perspective views of details of the mechanism.

Specification of Letters Patent.

Patented Apr. 27, 1920. 116,400.

head 2 having a vertical, cylindrical bore attached to the head 2 by means of screws 5 passing through elongated holes in the form; thus providing for adjustment of the form in the direction of the length of the heel.

A presser plate 6, corresponding to the shape of the heel, is attached, by means of a dovetailed guide, to a slide block 7, and held by a clamp 8 and a clamping screw 9. The slide block 7 fits a correspondingly shaped opening in a pressure arm 10 and is retained in the said opening by a cap 11 attached to the pressure arm by screws 12. An adjusting screw 13, operated by a hand wheel 14, is threaded into the block 7 and is provided with a flange, held between plates 15 and 16 secured to the top of the pressure arm 10. The slide block 7 is provided with an opening carrying a stud 17, the central part of which is flattened on two sides in order to fit the opening. The stud 1'? passes through holes in the front ends of two levers 18 situated one on each side of the slide block 7 and fulcrumed upon a stud 19 in the pressure arm 10. The rear ends of the levers 18 are provided with holes which serve as bearings for pins on the nut 20, which is threaded upon the upper end of the rod 21. The nut 20 is split and can be tightened, by means of a screw 22, in order to prevent the rod 21 from turning. The lower, threaded end of the rod 21 enters a nut 23, pivoted between two bell crank levers 24 which are fulcrumed upon a stud 25 mounted in the base 1 of the machine. The ends of the other arms of the levers 2e are connected to a link 26, to provide for adjustment of the main connecting rod 39. The threads upon the two ends of the rod 21 have difiierent pitches, so that turning the rod will alter the distance between the two nuts 20 and 23.

The pricking of the heels is effected by means of awls 30, mounted in an awl plate 32 secured to the awl block 31. The awls are guided through inclined holes in a die block 33 which is supported by its edges 341 upon projections on the head 2 and held in place by swinging ears and 36. The awl block 31 has a T slot in its under side which engages a correspondingly shaped projection upon the upper end of a plunger 37, which travels in the cylindrical bore 3.

The plunger 37 is forked at its lower end and provided with a stud 38, upon which is journaled the upper end of the connecting rod 39. The lower end of the connecting rod 39 is also forked and provided with a stud 40 carrying a block 41 which travels in a curved slot in an arm 42. The arm 42 is fulcrumed upon a stud 43, mounted in the base 1, and is actuated by an eccentric 44, through an eccentric strap 45 connected by a pin 96 to the arm. It will be seen that a change in the throw of the awls will be efiected by changing the position of the block 41 lengthwise ofthe slot in the arm 42.

The stud 40, which carries the block 41, is actuated by the link 26, whereby the adj ustment of the block 41 is effected simultaneously with the adjustment of the slide block 7 which carries the presser plate 6. The result obtained by this construction is that without attention on the part of the operator other than that required to adjust the presser plate the throw of the awls is varied in accordance with the height of the heel to be pricked; thus, for low heels, the presser plate 6 has to be lowered, the block 41 being, at the same time, moved toward the fulcrum stud 43 and reducing the throw of the awls. It will be seen that the heels will always be pricked to the same distance from the heel seat, regardless of their varying heights. By turning the rod 21, the actual depth of the holes pricked by the awls may be regulated as desired.

The pressure arm 10 is guided in its movements by rolls 50 mounted on studs 51 in the arm and running in a cam slot 52 formed in a guide piece 53 attached to the head 2. The slot 52 has sucha form that the pressure arm 10 is held vertically when in its lower position, as shown in Fig. 2, and is swung backwardly when in its upper position, as shown in Fig. 1, leaving sufiicient room, when in the latter position, to permit easy removal of the heel from the form 4.

A plug 54 rests in a hole in the bottom of the heel form and is raised, during the rearward swinging movement of the pressure arm 10, by means of a bell crank lever 55, fulcrumed upon a stud 56 in the head 2 .and operated by a link 57 and a pin 58 mounted in the pressure arm. As the plug 54 is raised in the heel form, it raises the heel slightly, releasing it from the form and permitting it to be removed easily.

The pressure arm 10 is operated by rods- 60 connected to links 61 which are slotted and planed out, as shown at 62. The plane surfaces 62 travel on suitable guides on the bearing bushings 64 and' the links 61 are connected at their lower ends by a rod 65 which, in turn, is connected, by links 66, to the treadle 67 Through the connections just described, the pressing of the treadle causes the presser head to swing forward and to move down upon the heel. In order to prevent the awls, during their upward movement, from raising the presser'head, in case the treadle is not held down with sufficient force, rolls 68 are provided upon the links 61 to coiiperate with a cam 69, which is cast integrally with the eccentric 44 The cam 69 has recesses 7 which the rolls enter when the treadle is released and elevated by its spring 71. The cam 69 is so formed that, during the pricking operation, it causes to be exerted upon the heel a constant pressure somewhat greater than that produced by the depression of the treadle. pression of the treadle'does not cause the so rolls 68 to clear the recess 70 entirely and they, consequently, ride upon the portion 72 of the cam face and are pressed downward slightly thereby.

The cam 69 and the eccentric 44 are 5 mounted upon a shaft 75 journaled in the bearings 64 mounted upon the base of the machine. The rotation of the shaft is controlled by a one revolution clutch, of any desired form, cotiperating with the fly wheel 76, which serves also as a pulley. The release of the clutch is effected by moving the stop arm 77 and its spring 78, out of the path of the clutch stop projection 79; but this, however, must be done before the cam 69 can operate to put the heel under pressure. T 0 this end, the clutch release mechanism is connected to the treadle, so that when the latter is depressed, the clutch is released. A link 80 connects the treadle to a rocker arm 81 upon one end of a rock shaft 82. The other end of the rock shaft carries a rocker arm 83 to which is connected a link 84. The link 84 is held against a brake drum 93 upon the shaft 75 by means of a spring 87 attached to a stud 88 mounted in the machine base. The spring pressed brake arm 85 carries a brake shoe bearing on the drum 93 to bring the machine to a stop at the proper, predetermined point. The arm 77 also carries a pawl 90 pivoted upon a stud 89 and limited in its movement in a clockwise direction by a pin 91. The pawl 90 is engaged by a shoulder 92 on the link 84 to cause the stop arm 77 to swing forwardly and release the clutch when the treadle is depressed. By raising the pawl 90 the machine may be prevented from starting while adjustments are being made, even though the treadle be depressed.

In order to limit the movement of the machine to one revolution the operation is as follows: The brake drum 93, during its rotation, depresses the link 84 about its pivot, disengaging the shoulder 92 from the pawl 90, so that the stop arm 77 may be retracted and effect the release of the clutch when one revolution of the machine is completed. The retraction of the stop arm is effected by a spring 94, one end of which is connected 13o to the arm 77 and the other end of which is attached to the brake arm 85.

he upper end of the spring 71, which elevates the treadle when it is released, is attached to the frame of the machine by a screw 95.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent is 1. In a heel pricking machine, a member for engagement with y the movement of proportionately to the height be pricked.

2. In a heel pricking machine, a movable member for engagement with a heel, a reciprocatory awl mounted independently of the heel-engaging member, pivoted connections for operating the awl, and connections be tween the engaging member and operating connections whereby the position of a pivoted connection may be altered to vary the movement of the awl.

In a heel pricking machine, a movable member for engagement with a heel, a reciprocatory awl, driving mechanism, members pivoted to one another and connecting the driving mechanism and awl, and a member connected to thepivot and to the heel-engaging member for varying the position of said pivot.

4. In a heel pricking machine, a movable member for engagement with a heel, a reciprocatory awl, driving mechanism, members pivoted at adjacent extremities to one another and at their opposite extremities to the driving mechanism and awl respectively,

may be varied of the heel to ber constructed position of the the members.

5. In a machine of the class described, the combination 0 means for supporting a heel,

upon the support, a to the awls, means for oscillating the arm,

in accordance with the height of the heel.

7. In a heel-pricking machine, a movable pressure member for engagement with a reciprocatory awl, a frame on which heel, a the pressure member and awl are movable,

awl, links pivotframe, and means constructed and arranged to vary the position of the pivotal connection between the links.

8. In a heel-pricking machine, a movable pressure member for engagement with a heel, a reciprocatory awl, a frame on which awl are movable, driving mechanism for the awl,

and driving mechanism and to one another, one of said links also being 9. In a heel-pricking machine, a movable pressure member for 10. In a heel-pricking machine, a movable pressure member for engagement with a heel, a reciprocatory awl, an eccentric and strap, a frame on which the previously men tioned elements are mounted, links pivoted respectively to the awl and eccentric strap and to one another, one of said links also being pivoted to the rame, and means constructed and arranged to vary the position of the pivotal connection between the links.

n testimony whereof I have signedmy name to this specification.

ANTON AUGUST HAAHR. 

